What is code signing in iOS operating system?

814

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What are layer objects and what do they represent in iOS operating system?

807

---

What is fast enumeration in iOS operating system?

861

---

What is the difference between delegates and notifications in iOS operating system?

838

---

What is dynamic typing in iOS operating system?

826

---

Implement the following methods: retain, release, auto release in iOS operating system?

800

---

What is dynamic in iOS operating system?

982

---

What is atomic and nonatomic in iOS operating system? What is run loop in iOS ?

842

---

What is a struct in iOS operating system?

769

---

Explain the difference between NSOperationQueue concurrent and non-concurrent in iOS operating system?

852

---

Which class will be subclassed in iOS operating system?

799

---

What is view object in iOS operating system?

919

---

Explain the options and bars available in xcode 4.x workspace window in iOS operating system

827

---

What is the difference between retain & assign in iOS operating system?

1013

---

What is the difference between NSArray and NSMutableArray in iOS operating system?

803

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